单选题What information, in addition to model number and serial number, is necessary to perform featureactivation for the IBM System Storage DS8000?（）A Machine signatureB Customer numberC Site locationD Customer contact number
题目
单选题
What information, in addition to model number and serial number, is necessary to perform featureactivation for the IBM System Storage DS8000?（）
A
Machine signature
B
Customer number
C
Site location
D
Customer contact number